钢筋混凝土空间网格结构曲率模态曲面拟合损伤识别研究

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振动与冲击 ›› 2013, Vol. 32 ›› Issue (3) : 68-74.

论文

钢筋混凝土空间网格结构曲率模态曲面拟合损伤识别研究

刘伟1,2，高维成1，李惠2，孙毅1

作者信息 +

Damage detection based on surface fitting of curvature mode shape for reinforced concrete spatial lattice structure

LIU Wei1,2 GAO Wei-cheng1 LI Hui2 SUN Yi1

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文章历史 +

摘要

本文介绍了钢筋混凝土空间网格结构的体系组成及构造特点；提出了曲率模态曲面拟合损伤识别理论，定义了曲率模态曲面拟合损伤指标CMSFDIi和平均曲率模态曲面拟合损伤指标CMSFDIiA，通过曲率模态与曲面拟合值的差异进行损伤定位，方法仅需利用从损伤结构获得的实测数据即可进行结构损伤识别，无需利用完好结构的基本信息和理论模型；最后通过钢筋混凝土正交正放空腹网架结构实例，验证了方法的有效性。计算结果表明，本文方法不仅可以识别单位置损伤还可以识别多位置损伤，对钢筋混凝土空间网格结构的损伤识别和健康监测是可行的。

Abstract

Firstly, system configuration and structure characteristics for reinforced concrete spatial lattice structure were introduced. Then, the curvature mode surface fitting damage identification theory was proposed. And the curvature mode surface fitting damage index (CMSFDIi) and the average of curvature mode surface fitting damage index (CMSFDIiA) were defined respectively. The damage can be located by the difference between curvature mode and its fitted value. The process of damage identification can be carried out using the measured data obtained from the damaged structure rather than the intact structure and theoretical models. Finally, orthorhombic reinforced concrete open-web grid structure was taken as an example to illustrate the feasibility and effectiveness of the method. The results show that this method can not only identify the single-location damage but also the multi-location damage. It was suitable for damage identification and structural health monitoring on reinforced concrete spatial lattice structure.

导出引用

刘伟;高维成;李惠;孙毅. 钢筋混凝土空间网格结构曲率模态曲面拟合损伤识别研究[J]. 振动与冲击, 2013, 32(3): 68-74

LIU Wei;GAO Wei-cheng LI Hui SUN Yi. Damage detection based on surface fitting of curvature mode shape for reinforced concrete spatial lattice structure[J]. Journal of Vibration and Shock, 2013, 32(3): 68-74